The verdict
If you are a Dutch company, I'd pick Exact Online, because VAT, ICP filing and bank handling are built for the Netherlands and the interface is in Dutch. If you operate where Xero has a local presence, want to add several people without paying per seat, or your accountant uses and recommends it, pick Xero. Before you commit to Xero, check the site for your country: VAT handling, bank connections and e-invoicing differ, and the US site shows a US-focused feature set. Ask your accountant which they prefer. Moneybird is also worth a look if you are Dutch.